Brettus turbo 11
07-02-2014, 04:29 AM
#959
07-10-2014, 07:54 PM
#967
Well ............... I was going for the 'always run above 1/4 tank when boosting ' solution . However this happened with tank at exactly 1/4 . Was just fortuitous that i happened to be recording it at the time .
My Idea witth the fuel pressure gauge was to run a boost cut in conjunction with the FP warning . I now wonder if this will work as it seems the engine starves momentarily BEFORE the alarm sounds
Good thing is no detonation (it would seem) .... W/M to thank for that .
My Idea witth the fuel pressure gauge was to run a boost cut in conjunction with the FP warning . I now wonder if this will work as it seems the engine starves momentarily BEFORE the alarm sounds
Good thing is no detonation (it would seem) .... W/M to thank for that .
07-11-2014, 06:16 PM
#972
that's why I referred you to dannobre; as he's stated many times a larger pump will just suck out the internal housing reservoir faster. As power increases so does fuel demand and acceleration-G pushing the fuel away from the pump location, even in a straight line ...
at some point you either need an additional surge tank/pump system of sufficient capacity or extensive fuel tank modifications rather than just a larger pump.
at some point you either need an additional surge tank/pump system of sufficient capacity or extensive fuel tank modifications rather than just a larger pump.
07-11-2014, 06:30 PM
#973
that's why I referred you to dannobre; as he's stated many times a larger pump will just suck out the internal housing reservoir faster. As power increases so does fuel demand and acceleration-G pushing the fuel away from the pump location, even in a straight line ...
at some point you either need an additional surge tank/pump system of sufficient capacity or extensive fuel tank modifications rather than just a larger pump.
at some point you either need an additional surge tank/pump system of sufficient capacity or extensive fuel tank modifications rather than just a larger pump.
I'm just trying to keep the car as a street car though and was hoping to get away with the 1/4 tank idea plus adding a failsafe system to prevent a total leanout under boost . Doesn't look like It's going to be any good though .
FWIW I have observed some interesting things since fitting the FP gauge .
Runs at 60psi when cruising , reaches 65psi when under boost at low rpm (when second stage kicks in), decays to about 55psi under boost at high rpm . Alarm was set on 50psi in video above .
This is with the DW 300 pump ..........
Last edited by Brettus; 07-11-2014 at 06:48 PM.
07-11-2014, 06:53 PM
#974
you need a boost vs tank level control loop 
j/k
the FP sensor control loop is good as a fail-safe but will never react fast enough. The sensor and injectors will experience the pressure drop within microseconds of each other given the fuel line size, length, and flow rate.
j/kthe FP sensor control loop is good as a fail-safe but will never react fast enough. The sensor and injectors will experience the pressure drop within microseconds of each other given the fuel line size, length, and flow rate.
07-11-2014, 06:57 PM
#975
you need a boost vs tank level control loop j/k
the FP sensor control loop is good as a fail-safe but will never react fast enough. The sensor and injectors will experience the pressure drop within microseconds of each other given the fuel line size, length, and flow rate.
j/kthe FP sensor control loop is good as a fail-safe but will never react fast enough. The sensor and injectors will experience the pressure drop within microseconds of each other given the fuel line size, length, and flow rate.
Any ideas on how i could get an extr few microseconds to allow a failsafe to work ?